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fast-classifier

The JMAP Client

Lives in src/provider/jmap.

What

Section titled “What”

Session discovery (apiUrl + primary mail account), batched methodCalls (Email/query + Email/get chained by back-reference in one round trip), and bulk Mailbox/set label creation with client ids c0, c1, … plus modal-parent inference — new labels nest under whatever parent your existing labels use most.

Origin

Section titled “Origin”

The session’s label-creation probes (reference/jmapcreate.mjs, colortest.mjs).

Quirks it encodes

Section titled “Quirks it encodes”
  • created/notCreated partial results are surfaced per label name.
  • Label color is not settable over JMAP (the session tried).
  • Fastmail signals per-record throttling as a SetError of type rateLimit inside notUpdated/notCreated rather than HTTP 429 — the client converts it into the same backoff path.